What Is a CFM File?

How to Open, Edit, & Convert CFM Files

Screenshot of several CFM files in Windows 10 that open with Notepad
CFM Files.

A file with the CFM file extension is a Cold Fusion Markup file. They're sometimes called Cold Fusion Markup Language files, which might be seen abbreviated as CFML.

Cold Fusion Markup files are web pages made up of specific code that enables scripts and applications to run on a ColdFusion web server.

How to Open an CFM File

CFM files are 100% text based, which means they can be opened as a text file with any text editor, like Notepad in Windows or an application from our Best Free Text Editors list. Programs like these will properly show the contents of the file.

Other programs can open CFM files too, like Adobe's ColdFusion and Dreamweaver software, as well as New Atlanta's BlueDragon.

Chances are, however, that unless you're a web developer, a CFM file you encounter probably shouldn't have been presented to you in that way. In other words, a server somewhere incorrectly provided you with a CFM file instead of the usable file you expected.

For example, let's say you downloaded a CFM file from somewhere that you expected to be in a format like PDF or DOCX. Adobe Reader isn't going to open the CFM and show your bank statement, nor is Microsoft Word going to show you that free greeting card template when it ends in CFM.

In these cases, try renaming the file, replacing the .cfm portion with .xyz, where xyz is the format you expected. After doing that, try opening the file normally, as you originally planned.

How to Convert a CFM File

Considering the text-based nature of a CFM file, there's little reason to use a conversion program. However, a CFM file can be saved/converted to HTM/HTML to be viewable in a browser, but any functionality provided by the ColdFusion server would, of course, be lost.

Remember, however, as I mentioned above, that most CFM files a regular person runs into are not actually supposed to end in .CFM. Try renaming the file instead of converting it in the traditional sense.

More Help with CFM Files

See Get More Help for information about contacting me on social networks or via email, posting on tech support forums, and more. Let me know what kinds of problems you're having with opening or using the CFM file, if you really expect it to be a Cold Fusion Markup file or not, and then I'll see what I can do to help.